Shock and Vibration Switch
VS-96013B
Revised 09-08
Catalog Section 20
00-02-0076
VS2EX
LISTED*
VS2 |
VS2 Series |
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■ Designed to Detect Shock/Vibration |
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in 3-Planes of Motion |
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■ Fully Adjustable |
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■ Includes Magnetic Latching Feature |
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■ Manual or Electric Reset |
Description
The VS2 Series switches are shock sensitive mechanisms for shutdown of engine or electric motor powered equipment. These switches use a magnetic latch to ensure reliable operation. Explosion-proof “EX” models for hazardous locations are available.
Applications
Ideal for use on engines, pumps, compressors, heat exchangers and pumping units, the VS2 Series can be used anywhere shutdown protection from damaging shock/vibration is desired. Switches are field adjustable to sensitivity required in each application.
Specifications
VS2 and VS2C
Case: Equal to NEMA 3R. Suitable for non-hazardous areas.
VS2: Base mount
VS2C: C-clamp mount, includes 45 ft. (13.7 m) 2-conductor cable, and 5 cable clamps.
Contacts: SPDT-double make leaf contacts, 5A @ 480 VAC.
VS2EX
Case: Base mount, explosion-proof aluminum alloy housing; meets NEMA 7/IP50 specifications; Class I, Division 1, Groups C & D; UL and CSA listed*.
Snap-switches: 2-SPDT snap-switches; 5A @ 480 VAC;* 2A resistive, 1A inductive, up to 30 VDC.
Normal Operating Temperature: -40 to 140°F (-40 to 60°C).
VS2EXR
Case: Same as VS2EX.
Snap-switch: 1-SPDT snap-switch and reset coil; 5A @ 480 VAC;*2A resistive, 1A inductive, up to 30 VDC.
Remote Reset : 115 VAC or 24 VDC (specify).
VS2EXRB
Case: Explosion-proof aluminum alloy housing; rated Class I, Division 1, Group B hazardous areas.
Snap-switch: 1-SPDT snap-switch with reset coil (option available for 2-SPDT switches); 5A @ 480 VAC; 2A resistive, 1A inductive, up to 30 VDC.
Remote Reset: 115 VAC or 24 VDC (specify).
Basic Operation
Pushing the reset button moves the tripping latch into a magnetically held position.
A shock/vibration will move the magnet beyond this holding position, thus freeing the spring loaded tripping latch to transfer the contacts and shutdown the machinery (see dimensional diagrams in the following pages for visual representation of parts).
Remote Reset Option (VS2EXR and VS2EXRB)
The remote reset option includes a builtin electric solenoid which allows reset of tripped unit from a remote location.
Available for 115 VAC or 24 VDC.
Warranty
A limited warranty on materials and workmanship is given with this FW Murphy product. A copy of the warranty may be viewed or printed by going to www.fwmurphy.com/support/warranty.htm
*CSA and UL listed with 480 VAC rating.
VS-96013B page 1 of 4
VS2 and VS2C
The VS2 and VS2C are designed for use in non-hazardous locations. They have leaf type SPDT, double make contacts that can be used for shutdown and/or alarm. They have a slotted sensitivity adjustment located on the side of the case (see drawing below).
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ELECTRICAL |
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ContactRating: |
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5 A @ 480 VAC |
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NO1 |
NC |
COM |
NO2 |
SIDE VIEW |
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FRONT VIEW |
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Air Gap |
(Cover removed) |
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3-1/8 in. |
Permanent |
4-11/16 in. |
Adjustment |
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(80 mm) |
(119 mm) |
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Magnet |
Armature |
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Reset |
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Slotted Sensitivity |
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Adjustment |
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4-11/16 in. |
Push |
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Button |
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(119 mm) |
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1/2 Conduit |
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Threads |
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5-3/8 in. |
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NO1 NC COM |
NO2 |
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Weatherproof |
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(137 mm) |
Mounting |
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Strain Relief |
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VS2C Model |
Bracket |
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Bushing (VS2C) |
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C-clamp |
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1/4 x 1/2 in. |
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Mounting |
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(6 mm x 13 mm) |
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Bracket |
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Slot 2 places |
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VS2C Model |
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2-1/4 in. |
5-1/8 in. (130 mm) |
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(57 mm) |
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Mounting Holes |
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VS2EX
•NEMA 7/IP50 Specifications
•Snap-switch Contacts
•TATTLETALE® Reset Button
Model VS2EX is housed in an explosion-proof enclosure with threaded cover. This enclosure is CSA and UL listed for Class I, Division 1, Groups C & D hazardous locations. In place of the leaf type contacts, 2-SPDT snap-switches are used in this model. Sensitivity is externally adjustable and, when tripped, the VS2EX gives a TATTLTALE® indication on the reset button. It is constructed to meet NEMA 7 specifications.
4-40 NC
Screw
Terminal
Permanent
Magnet
TATTLETALE®
Reset Push
Button
Air Gap
3/8 in. (10 mm) 4 places
5-5/8 in. (143 mm) 
3 in.
(76 mm) 
Mounting
Holes
5-1/4 in.
(133 mm)
NC NO COM Mounting
Holes
NC NO COM
6-3/8 in. (162 mm)
TOP VIEW (Cover removed)
ELECTRICAL |
2-SPDT Switches (DPDT) |
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ContactRating: |
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5 A @ 125–480 VAC |
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1/2 A @ 125 VDC |
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N.O. N.C. COM |
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1/4 A @ 250 VDC |
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2 A Resistive 30 VDC |
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1 A Inductive 30 VDC |
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N.O. N.C. COM
1/2 NPT
Conduit
4-7/8 in. (124 mm)
1-3/4 in.
(44 mm)
Slotted
Sensitivity
Adjustment
MORE LESS
SENSITIVE SENSITIVE
SIDE VIEW
VS-96013B page 2 of 4
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